Portable computer



FIG. 1 is a top, front, and right side perspective view of a portable computer showing our new design;

FIG. 2 is a top plan view thereof on an enlarged scale;

FIG. 3 is a front elevation thereof on an enlarged scale;

FIG. 4 is a right side elevation thereof;

FIG. 5 is a left side elevation thereof; and

FIG. 6 is a rear elevation thereof on an enlarged scale, the design shown in the opened position. 

The ornamental design for a portable computer, as shown and described. 